Mop ring



FIG. 1 is a perspective view of a mop ring in accordance with the present design;

FIG. 2 is a right side view and a left side view thereof;

FIG. 3 is a front view and a back view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design. The shading represents contour of the claimed design. 

CLAIM The ornamental design for a mop ring, as shown and described. 